Which of the following provides the best analogy for an electron in an atomic orbital?

a. a cow grazing in a pasture
b. a bird resting on a tree branch
c. an ant crawling on the surface of a leaf
d. a bee hovering around a bee hive

The correct answer is D. A bee hovering around a beehive

Explanation:

Electrons are negatively charged, and they orbit the nucleus of atoms, where protons (positively charged) and neutrons (neutrally charged) are. Besides this, the difference in electric charge makes electrons to constantly orbit the nucleus, although these can still change their orbital (zone in which the electron orbits).

In this context, the best analogy for an electron is a bee hovering around a beehive because as electrons bees constantly orbit the beehive that represents the nucleus. Also, they can change their orbit or movement but will still orbit the beehive, and there is an attractive force between the bee and the beehive as it occurs between the electron and the nucleus.

blood enters the heart through two large veins, the inferior and superior vena cava, emptying oxygen-poor blood from the body into the right atrium of the heart. as the ventricle contracts, blood leaves the heart through the pulmonic valve, into the pulmonary artery and to the lungs where it is oxygenated.

the correct answer is anaphylaxis.

anaphylaxis is a condition caused by insect bites, foods, medications, manifested by tongue swelling, shortness of breath, vomiting, low blood pressure. it sometimes may occur without an obvious reason. it is treated with epinephrine injection.other tretments include antihistamines and steroids,